Application: Can be used for treasure hunting in the sea/river. Great for recovering keys down a drain or overboard a boat.Note: The vertical tension would be much larger than the horizontal tension, because the horizontal tension is effectedby the adsorption interface roughness.

Features:1. Strong magnetic with 304 steel and neodymium magnet.2. The strong magnetic force is concentrated only on one side, and the other three sides are almost non-magnetic.3. Small size,magnetic permanent, long service life4. Can absorb on any places where have metal to hang items.5. Great for recovering keys down a drain or overboard a boat.